tests.diff

diff --git a/packages/editor/src/components/post-author/index.js b/packages/editor/src/components/post-author/index.js
index bdd9c30596..623a0ad82b 100644
--- a/packages/editor/src/components/post-author/index.js
+++ b/packages/editor/src/components/post-author/index.js
@@ -17,8 +17,7 @@ import { compose, withInstanceId } from '@wordpress/compose';
  */
 import PostAuthorCheck from './check';
 
-function PostAuthor( { authors, postAuthor, onUpdateAuthor } ) {
-
+export function PostAuthor( { authors, postAuthor, onUpdateAuthor } ) {
 	const authorsForField = useMemo( () => {
 		return authors.map( ( author ) => {
 			return {
@@ -62,6 +61,8 @@ function PostAuthor( { authors, postAuthor, onUpdateAuthor } ) {
 		setFieldValue( inputValue );
 	};
 
+	let isLoading;
+
 	const availableAuthors = useSelect(
 		( select ) => {
 			if (
@@ -87,7 +88,7 @@ function PostAuthor( { authors, postAuthor, onUpdateAuthor } ) {
 		[ fieldValue, postAuthor, isLoading ]
 	);
 
-	const isLoading = useSelect(
+	isLoading = useSelect(
 		( select ) => {
 			return select( 'core/data' ).isResolving( 'core', 'getAuthors', [
 				{ search: fieldValue },
diff --git a/packages/editor/src/components/post-author/test/index.js b/packages/editor/src/components/post-author/test/index.js
index 368be4fda7..3387a8b095 100644
--- a/packages/editor/src/components/post-author/test/index.js
+++ b/packages/editor/src/components/post-author/test/index.js
@@ -1,3 +1,13 @@
+
+/**
+ * WordPress dependencies
+ */
+import {
+	select as dataSelect,
+	createRegistry,
+	registerGenericStore,
+} from '@wordpress/data';
+
 /**
  * External dependencies
  */
@@ -41,18 +51,58 @@ describe( 'PostAuthor', () => {
 		},
 	};
 
+	const postAuthor = {
+		id: 1,
+		name: 'admin',
+	};
+
 	describe( '#render()', () => {
 		it( 'should update author', () => {
 			const onUpdateAuthor = jest.fn();
+
+			registerGenericStore( 'core/data', {
+				getActions: () => ( { foo: 'bar' } ),
+				subscribe: () => ( { foo: 'bar' } ),
+				getSelectors: () => {
+					return { 'isResolving': () => false };
+				},
+			} );
+
+			registerGenericStore( 'core', {
+				getActions: () => ( { foo: 'bar' } ),
+				subscribe: () => ( { foo: 'bar' } ),
+				getSelectors: () => {
+					return {
+						'getAuthors': () => authors,
+						'getAuthor': () => authors[ 0 ],
+					};
+				},
+			} );
+
+			registerGenericStore( 'core/editor', {
+				getActions: () => ( { editPost: () => {} } ),
+				subscribe: () => ( { foo: 'bar' } ),
+				getSelectors: () => {
+					return {
+						'getCurrentPost': () => {},
+						'getCurrentPostType': () => {},
+						'getEditedPostAttribute': () => {},
+					};
+				},
+			} );
+
 			const wrapper = shallow(
 				<PostAuthor
 					authors={ authors }
 					user={ user }
 					onUpdateAuthor={ onUpdateAuthor }
+					postAuthor={ postAuthor }
 				/>
 			);
 
-			wrapper.find( 'select' ).simulate( 'change', {
+			expect( onUpdateAuthor ).toHaveBeenCalledWith( ["fieldValue", "admin"] );
+
+			wrapper.find( 'input' ).simulate( 'change', {
 				target: {
 					value: '3',
 				},
@@ -62,3 +112,4 @@ describe( 'PostAuthor', () => {
 		} );
 	} );
 } );
+